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Identification and ab initio carbon-13 NMR assignment of a proanthocyanidin from Prunus jacquemontii

✍ Scribed by Geeta Pant; Anil K. Nautiyal; Mohan S. M. Rawat; James K. Sutherland; Gareth A. Morris

Book ID: 102525804
Publisher: John Wiley and Sons
Year: 1992
Tongue: English
Weight: 403 KB
Volume: 30
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260301323

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✦ Synopsis

Abstract

The concerted use of 1D and 2D multiple pulse NMR methods allowed the identification and assignment of a proanthocyanidin, ent‐epiafzelechin(4α → 8; 2α → O → 7)‐epicatechin, extracted from the bark of Prunus jacquemontii. Reference deconvolution with the FIDDLE algorithm was successfully used for line shape correction of a ^13^C spectrum with poor signal‐to‐noise ratio. Over 70 long‐range proton– ^13^C correlations were determined with the HMBC experiment, following modifications to improve instrument signal reproducibility, illustrating the value of this experiment when applied to systems with relatively few protons.

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